Firewall question

[Bradley Pursley]

Anne Wilson wrote:
> In another thread Tim Evans said:
>
> You can, however, configure iptables to *allow* only a specified list of
> IP addresses (i.e., the ones you approve of).
>
> This set me wondering.  If you use wifi hotspots to collect mail, for 
> instance, you have no idea what IPs you will be using.  Is there any way that 
> the system can recognise the computer rather than the IP?  I'm guessing it 
> must be possible, as my on-line bank knows immediately if I use a computer 
> that I haven't used before.
I suspect that it recognizes your computer because of a cookie that is 
cached for their site.

Bradley